Cartridge-case for charging blast-holes



(No-Model.) r

R. H.'ELLIOTT 8v J'. B. OARRINGTON.

CARTRIDGE CASE FOR GHARG I NGBLAST HOLES No.-54 2, 154i.- Patented July2,1895.

UNITED STATES PATENT O FICE Bonner n. ELLIOTT, on BlRMlNGl-lAM, AND JOHNB. CARRINGTON, or JASPER ALABAMA, ASSIGNORS TO Tun ALABAMA BLASTING NDMINING -M- PANY, OF ALABAMA.

CARTRIDGE-CASE FOR CHARGING BLAST-HOLES. j

SPECIFICATION forming part of Letters Patent N0. 54.2 154, dated July 2,1 895. Application filed March 11, 1895. a Serial No. 541,33 on} model)To all whom it may concern.-

Be it known that we, ROBERT II. ELLIOTT, residing at Birmingham, in thecounty of Jefferson, and JOHN B. CARRINGTON, residing at 5 Jasper, in'the county of \Valker, State of Alabama, citizens of the United States,have invented. certain new and useful Improvements in' Cartridge-Casesfor Leading Blasting lloles with Explosives; and we do hereby to declarethe following to be afull, clear, and

exact description of the invention, such as will enableothers skilled inthe art to which it appertains to make and use the same.

()ur invention relates to improvements in :5 means for placing theexplosive material in' the proper position in the bore-hole, and itconsists in providing a friable cartridge adapted to contain theexplosive material, which cartridge is pushed down to the desiredposition in the bore-hole and is there crushed,

and the contents of the said-cartridge are distributed accurately inplace. Paper, flannel, or cloth cartridge-cases are ordinarily usedfor'this purpose; but these bend under the blows of the r'am tner and donot break up readily, thus preventing that loose disposition of theexplosive material which is desirable in blasting.

In blastingin coal,soft rock, or loose mate- 0 rial powder of such aninferior grade or so large a grain is used that where several of theflannel, cloth, or paper cartridges, as ordinarily constructed, areused, the simultaneous explosion of the several charges, which is 5necessary to produce the greatest effect, is not obtained.

In practice we provide a cartridge-case for the explosive material, madepartly of flexible material-and partly of friable material, such 40 as acompound cartridge-case made of friable clay and of paper or likematerial.

\Vhile we specifically refer to clay and paper, any suitable friablematerial may be used in place of the clay, and cloth or like mate- 4 5rial may be used as a substitute for the paper.

Reference is had to the accompanying drawings, in which the same partsare indicated .by the same letters throughout the several views.

Figure represents an end view of one of our-improved. cartridge-cases.Figs. 2 and 3 represent perspective views of the parts composing thecartridgercase shown in Fig. 1. Fig. 4 represents an end view of amodified form of cartridge-case, and Fig. 5 represents a perspectiveView of the same before being completed.

Referring particularly to Figs. 1 to 3, the cartridge-case is made up oftwo staves A, forming part of a circumference of a cylinder, whichstaves are connected together by the strips B of paper, cloth, or likematerial, whici strips are glued to the stares A, as at b. E be ends ofthese strips are made to projechliqyond the ends of the staves A, as atb, 6

so thatthey may be bent'over'to form the completed and closed. end ofthecartridgecase. 7

In the forrn'of device shown in Figs. 4 and 5 there is but one stave A,which is prefer- 7o ably approximately semicylindrical in shape, theopposite side of the cylinder being closed in" by the strip B, which isglued to the stave A, and is provided with projecting ends, as

has been already described with reference to Figs. 1 to In any oftheherein-described forms of cartridge-case the explosive materialisinserted into the cartridge-case and the ends thereof are closed. Thecompleted cartridge is then shoved down to thedesired poiutin theboreholes, and the friable material is crushed, causing the contents ofthe cartridge to be released in the bore-hole at any point desired.These contents are then fired in the ordinary 8 5 way.

It will thus be seen that the explosive ma-. terial may be readily andconveniently carried to the desired point and then may be released inorder to be employed in the most 0 eflfective way.

The advantages of the herein-described construction will readily suggestthemselves to any pr -tical mind. V

Having thusid'cscribecl our invention, what 5 we. claim, and desire tosecure by Letters Patent of the United States, is

1. A cartridge case for use in conveying explosivemateriahwliichconsists partly of a I material, and partly of paper,substantially to friable material, and partly of a flexible maasdescribed.'- terial, substantially as described. In testimony whereof weaflix onr signa- 2. .A eartx'ifige case for conveying explosive tures inpresence of two witnesses. 5 material, which consists partly offriableclay, ROBERT -H. ELLIOTT.

and partly of a, flexible materiaL'substam JOHN B. GARRINGTON. tialiy asdescribed. 7 \Vitnesses: f

3. A cartridge ease for conveying explosive W. G. ROBINSQN, material,which consists partly of'& friable 4 H. C. KENNARD.

